Section 11
SEC. 11. Any persons or association of persons occupying or using any part of the public domain for grazing purposes without lease or permit in violation of the provisions of this Act or any rules or regulations promulgated thereunder shall be liable to the payment of twice the regular rental charges now or hereafter provided for by regulations during such time that the area is illegally used or occupied. For failure to pay the rental charges due within thirty days after they had become due and payable, the respondent shall be penalized by an additional charge of fifty per centum of such rental charges.